Rheostat structure of electrical-hydraulic rheostat starter

Abstract

The invention discloses a rheostat structure of an electrical-hydraulic rheostat starter. The rheostat structure comprises a water tank, three pairs of electrode bars and an electrode bar lifting structure. The rheostat structure further comprises two locating columns, a buoy and a flexible indication strip, wherein the locating columns are fixed into the water tank; the buoy is arranged on one locating column in a sleeving mode and can move vertically along with the water level; the flexible indication strip is partly inserted in a slot formed in the inner surface of a water tank cover, one end of the flexible indication strip is fixed to the buoy, the flexible indication strip moves vertically along with the buoy, and vertical change of the water level can be converted into horizontal change through the flexible indication strip. The water tank cover is provided with holes which the electrode bars are inserted in, seal rings arranged outside the electrode bars in a sleeving mode and a housing used for fixing the seal rings to the inner surface of the water tank cover. The rheostat structure further comprises a standby water tank, wherein the standby water tank is adjacent to the water tank, a water pump is arranged in the standby water tank, and the water pump can inject water in the standby water tank into the water tank through an inlet in the upper portion of the water tank. The rheostat structure further comprises a magnetic material and a reed switch which are used for controlling the water pump to work. The rheostat structure of the electrical-hydraulic rheostat starter has the advantages of being reasonable in structure, low in cost, easy and convenient to maintain and longer in maintenance period.

Description

Technical field [0001] The invention relates to a variable resistance structure of an electro-hydraulic variable resistance starter, which belongs to the field of motor soft starting. [0002] Background technique [0003] The electro-hydraulic variable resistance starter is used to start the motor. We know that when the motor starts, the starting current is very large. At this time, the efficiency of the large current is very low. Therefore, the electrical energy is wasted. In order to solve this technical problem, a common solution One is to connect the varistor in series, limit the current, and gradually increase the speed of the motor through the varistor, and finally achieve the purpose of energy saving. The varistor usually uses water as a resistor, and then inserts the electrode into the water through the electrode. Change the resistance. In the prior art, in order to avoid factors such as water leakage and electricity leakage, no water level indicator is provided, and wat...

AI Technical Summary

Problems solved by technology

[0003] The electro-hydraulic rheostat starter is used to start the motor. We know that when the motor starts, the starting current is very large. At this time, the efficiency of the large current is very low. Therefore, the waste of electric energy is very large. In order to solve this technical problem, a common solution One is to connect rheostats in series to limit the current, gradually increase the speed of the motor through the rheostats, and finally achieve the goal of energy saving. variable resistance

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